A high-field EPR tour of radicals in photosystems I and II |
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| Authors: | S. Un P. Dorlet A. W. Rutherford |
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| Affiliation: | 1. Proteines Membranaires Transductices d’énergie, Unité de Recherche Associée 2096 du Centre National de la Recherche Scientifique, Commissariat à l’énergie Atomique Saclay, Gif-sur-Yvette, France
2. Section de Bioénergétique, CNRS URA 2096, Bat. 532, Commissariat à l’énergie Atomique Saclay, 91191, Gif-sur-Yvette cedex, France
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| Abstract: | High magnetic-field electron paramagnetic resonance (HFEPR) has been extensively applied to the study of photosynthetic reaction centers. HFEPR experiments have provided accurate measurements ofg-values of radicals in photosystems I and II. Theg-values not only reflect the structure of the radical, but also its immediate environment. Hence, valuable information about radicalprotein interactions can be obtained fromg-values. Data on tyrosine-, quinone-, pheophytin- and chlorophyll-based radicals are reviewed. Experiments dealing with spin pairs in photosystem I and II are examined. The spectrometer with which numerous experiments on photosystems have been carried out is described, as well as the 10 T magnet around which the spectrometer is based. |
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